<template>
	<view>
		<my-search @click="searchbox"></my-search>
		<view class="scroll-view-container">
			<scroll-view class="left-scroll-view" scroll-y="true" :style="{height:wh+'px'}">
				<block v-for="(item,i) in cateList" :key="i">
					<view :class="['left-scroll-view-item',i===active?'active':'']" @click="activeChanged(i)">
						{{item.cat_name}}
					</view>
				</block>

			</scroll-view>
			<scroll-view class="right-scroll-view" scroll-y="true" :style="{height:wh+'px'}" :scroll-top="scrollTop">
				<!-- 二级分类-->
				<view class="cate-lv2" v-for="(item2,i2) in cateLevel2" :key="i2">
					<!-- 二级分类的标题 -->
					<view class="cate-lv2-title">/{{item2.cat_name}}/</view>
					<!-- 三级分类 -->
					<view class="cate-lv3">
						<!-- 三级分类--item项 -->
						<view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3"
							@click="gotogoodsitem(item3)">
							<img :src="item3.cat_icon">
							<text>{{item3.cat_name}}</text>
						</view>
					</view>

				</view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	import badgeMix from '../../mixins/tabbar-badge.js'
	export default {
		mixins: [badgeMix],
		data() {
			return {
				scrollTop: 0,
				cateList: [],
				cateLevel2: [],
				//屏幕可用高度
				wh: 0,
				active: 0
			};
		},
		onLoad() {
			const sysInfo = uni.getSystemInfoSync()
			this.wh = sysInfo.windowHeight - 50
			this.getcateList()
		},
		methods: {
			searchbox() {
				uni.navigateTo({
					url: '/subpkg/search/search'
				})
			},
			getcateList() {
				uni.request({
					url: 'https://api-hmugo-web.itheima.net/api/public/v1/categories',
					method: 'GET',
					success: (res) => {
						if (res.data.meta.status !== 200) {
							return uni.$showMsg()
						}
						this.cateList = res.data.message,
							this.cateLevel2 = res.data.message[0].children
					},
				})
			},
			activeChanged(i) {
				this.active = i
				this.cateLevel2 = this.cateList[i].children
				this.scrollTop = this.scrollTop === 1 ? 0 : 1
			},
			gotogoodsitem(item) {
				uni.navigateTo({
					url: '/subpkg/goods_list/goods_list?cid=' + item.cat_id
				})
			}
		}
	}
</script>

<style lang="scss">
	.scroll-view-container {
		display: flex;

		.left-scroll-view {
			width: 120px;

			.left-scroll-view-item {
				background-color: #fee9f3;
				line-height: 60px;
				text-align: center;
				font-size: 12px;

				&.active {
					background-color: #fef5f9;
					position: relative;

					&::before {
						content: '';
						display: block;
						width: 3px;
						height: 30px;
						background-color: #c68980;
						position: absolute;
						top: 25%;
					}
				}
			}
		}
	}

	.cate-lv2-title {
		text-align: center;
		font-size: 12px;
		font-weight: bold;
		padding: 15px 0;
	}

	.cate-lv3 {
		display: flex;
		flex-wrap: wrap;

		.cate-lv3-item {
			width: 33.33%;
			display: flex;
			flex-direction: column;
			text-align: center;
			align-items: center;
			margin-bottom: 10px;

			img {
				width: 60px;
				height: 60px;
			}

			text {
				font-size: 12px;
			}
		}
	}
</style>